var Bind = function(object, fun) {  
    return function() {  
        return fun.apply(object, arguments);  
    }  
}  
function AutoComplete(obj,autoObj,arr){
    this.obj=document.getElementById(obj);        //输入框  
    this.autoObj=document.getElementById(autoObj);//DIV的根节点  
    this.value_arr=arr;        //不要包含重复值  
    this.index=-1;          //当前选中的DIV的索引  
    this.search_value="";   //保存当前搜索的字符      
}  
 	
			
/*********************************************************************************/		
			AutoComplete.prototype={  
    //初始化DIV的位置  
    init: function(){  
        this.autoObj.style.left = this.obj.offsetLeft + "px";  
        this.autoObj.style.top  = this.obj.offsetTop + this.obj.offsetHeight + "px";  
        this.autoObj.style.width= this.obj.offsetWidth - 2 + "px";//减去边框的长度2px     
    },  
    //删除自动完成需要的所有DIV  
    deleteDIV: function(){  
        while(this.autoObj.hasChildNodes()){  
            this.autoObj.removeChild(this.autoObj.firstChild);  
        }  
        this.autoObj.className="auto_hidden";  
    },  
    //设置值  
    setValue: function(_this){  
        return function(){  
            _this.obj.value=this.seq;  
            _this.autoObj.className="auto_hidden";  
        }         
    },  
    //模拟鼠标移动至DIV时，DIV高亮  
    autoOnmouseover: function(_this,_div_index){  
        return function(){  
            _this.index=_div_index;  
            var length = _this.autoObj.children.length;  
            for(var j=0;j<length;j++){  
                if(j!=_this.index ){         
                    _this.autoObj.childNodes[j].className='auto_onmouseout';  
                }else{  
                    _this.autoObj.childNodes[j].className='auto_onmouseover';  
                    _this.obj.value=this.seq;  
                }  
            }              
        }  
    },  
    //更改classname  
    changeClassname: function(length){  
        for(var i=0;i<length;i++){  
            if(i!=this.index ){         
                this.autoObj.childNodes[i].className='auto_onmouseout';  
            }else{  
                this.autoObj.childNodes[i].className='auto_onmouseover';  
                this.obj.value=this.autoObj.childNodes[i].seq;  
            }  
        }  
    }   
    ,  
    //响应键盘  
    pressKey: function(event){  
        var length = this.autoObj.children.length;  
        //光标键"↓"  
        if(event.keyCode==40){  
            ++this.index;  
            if(this.index>length){  
                this.index=0;  
            }else if(this.index==length){  
                this.obj.value=this.search_value;  
            }  
            this.changeClassname(length);  
        }  
        //光标键"↑"  
        else if(event.keyCode==38){  
            this.index--;  
            if(this.index<-1){  
                this.index=length - 1;  
            }else if(this.index==-1){  
                this.obj.value=this.search_value;  
            }  
            this.changeClassname(length);  
        }  
        //回车键  
        else if(event.keyCode==13){  
            this.autoObj.className="auto_hidden";  
            this.index=-1;  
        }else{  
            this.index=-1;  
        }  
    },  
    //程序入口  
    start: function(event){  
        if(event.keyCode!=13&&event.keyCode!=38&&event.keyCode!=40){  
            this.init();  
            this.deleteDIV();  
            this.search_value=this.obj.value;  
            var valueArr=this.value_arr;  
            valueArr.sort();  
            if(this.obj.value.replace(/(^\s*)|(\s*$)/g,'')==""){ return; }//值为空，退出  
            try{ var reg = new RegExp("(" + this.obj.value + ")","i");}  
            catch (e){ return; }  
            var div_index=0;//记录创建的DIV的索引  
            for(var i=0;i<valueArr.length;i++){  
                if(reg.test(valueArr[i])){  
                    var div = document.createElement("div");  
                    div.className="auto_onmouseout";  
                    div.seq=valueArr[i];  
                    div.onclick=this.setValue(this);  
                    div.onmouseover=this.autoOnmouseover(this,div_index);  
                    div.innerHTML=valueArr[i].replace(reg,"<strong>$1</strong>");//搜索到的字符粗体显示  
                    this.autoObj.appendChild(div);  
                    this.autoObj.className="auto_show";  
                    div_index++;  
                }  
            }  
        }  
        this.pressKey(event);  
        window.onresize=Bind(this,function(){this.init();});  
    }  
}